in the tapes obtained by cnn, the soldiers accused in their own words are not denying anything. but trying to explain how highly-trained soldiers could become a band of killers. >> so we identified a guy, like, you know, gibbs. gibbs makes a comment like, hey, do you guys want to wax this guy or what? and, you know, he would set it up. so he grabbed the dude. >> reporter: corporal jeremy morlock accused of killing three afghan men, two my shooting. the third, which is described to a military investigator, was literally a set-up, he says, by his platoon leader, sergeant gibbs. >> we had this guy by his compound some gibbs walked him out and set him in place, like, hey, stand here. >> was he fully cooperating? >> yeah. >> was he armed? >> no. not that we were aware of. >> where did you stand him? next to a wall?